EP0727657B1 - Appareil simple pour la mesure de la transmission - Google Patents

Appareil simple pour la mesure de la transmission Download PDF

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Publication number
EP0727657B1
EP0727657B1 EP95303663A EP95303663A EP0727657B1 EP 0727657 B1 EP0727657 B1 EP 0727657B1 EP 95303663 A EP95303663 A EP 95303663A EP 95303663 A EP95303663 A EP 95303663A EP 0727657 B1 EP0727657 B1 EP 0727657B1
Authority
EP
European Patent Office
Prior art keywords
light
band
pass filter
emitting diode
instrument according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95303663A
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German (de)
English (en)
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EP0727657A1 (fr
Inventor
Takashi Sunamori
Hiroshi Sato
Masakazu Hirose
Kazuo Yanauti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taisei Chemical Industries Ltd
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Taisei Chemical Industries Ltd
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Application filed by Taisei Chemical Industries Ltd filed Critical Taisei Chemical Industries Ltd
Publication of EP0727657A1 publication Critical patent/EP0727657A1/fr
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/8483—Investigating reagent band
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems

Definitions

  • This invention relates to a simple instrument for measuring the transmittance of a dye-impregnated film in such a simple, film-type integrated global solar radiation-measuring system that utilizing the fact that when the dye-impregnated film is exposed to solar radiation the dye-impregnated film is faded corresponding to the amount of the integrated solar radiation energy, the amount of the exposed integrated solar radiation energy is inferred from the degree of the color fading determined by measuring the transmittance of the film.
  • the amount of energy poured from the sun to the earth depends upon artificial phenomena such as an increase in the amount of carbon dioxide gas generated artificially, the destroying of the ozonesphere, the accumulation of burning products of fossil resources, and the like; and natural phenomena such as the accumulation of volcanic ash mist due to a volcanic eruption and the like, so that the natural environment surrounding human beings is changing gradually. Said change can be seized on the whole; however, the local information thereof is very little.
  • the amount of solar radiation energy at each point in the living environment is greatly varied depending upon the configuration of the ground and the circumstances surrounding the points such as in water, in the shade of artificial structures, and the like; more specifically speaking, in the surface material of each leaf of a luxuriating plant; and the like, and it seems necessary to grasp, with an exactness to some extent, the amount of solar radiation energy in these local places and study its causual relation with various phenomena of living things, atmospheric phenomena and the like.
  • the object of this invention is to provide a simple measurement instrument aiming at simply and quickly measuring, at the measurement locales, the transmittances of simultaneous many-place-exposure samples of a dye-impregnated film having an effective exposure area of 3 cm 2 or less for measuring the amount of solar radiation energy. Accordingly, the measurement instrument should have a small size and a light weight.
  • the measurement precision of the instrument be such that not the mere transmittance of light but the absorbance reduced from the transmittance measured corresponds exactly to the result of measurement by a general spectrophotometer and this invention intends to obtain such a measurement instrument.
  • the measurement instrument may be relatively simple; however, in order to achieve the object of obtaining measurement values equivalent to those of a spectrophotometer by which the absorbance is determined from the transmittance measured using a sharp monochromatic light having a narrow half-value width and quantitatively determining the absorbance from them, the necessary measures must be adopted, and the main points thereof are as follows:
  • this invention has been completed by adopting a newly developed light-emitting diode which emits a light having a wavelength in the vicinity of 450 nm at a high luminance-emission intensity and combining this with a band-pass filter prepared by coating a resin film or glass plate with a coating composition in which a violet and/or blue pigment is so finely dispersed in a binder resin that a high transparency is shown.
  • the simple transmittance-measuring instrument of this invention is a simple instrument for measuring the transmittance of a film impregnated with a pyridylazo-2-naphthol or dimethylphenylazo-2-naphthol dye having a continuous absorption spectrum having a plurality of peaks in the wavelength range of from 350 to 800 nm, which comprises a light source part composed mainly of a high luminance-emission intensity light-emitting diode which emits a light having a relative emission intensity peak in the vicinity of a wavelength of 450 nm and a half-value width of 70 nm or less at an emission angle of 20° or less; a means for allowing the diode to emit a light; a band-pass filter which consists essentially of a resin film or glass plate coated with a coating composition composed essentially of at least one pigment selected from the group consisting a Phthalocyanine Blue pigment and an organic violet pigment finely dispersed in a bin
  • the light emitted by the light-emitting diode is passed through the band-pass filter to allow the filter to partially absorb the light, thereby adjusting the light to have a half-value width narrower than the half-value width of an absorption peak of the dye-impregnated film alone, and the thus adjusted light is used as an irradiation light for measuring the transmittance of the dye-impregnated film.
  • the quantity of the irradiation light is freely adjusted by the light quantity adjuster.
  • the light-emitting diode used in this invention includes specifically a high luminance-emission intensity light-emitting diode such as Light-Emitting Diode NLPB500 manufactured by Nichia Kagaku Kogyo K. K. and the like.
  • the means for allowing the diode to emit a light and adjusting the quantity of light may be any means which is conventionally used for the same purpose such as the electric circuit shown in the light quantity adjuster and the light-emitting diode driving means in Fig. 1.
  • the pigment used in the coating composition for preparing the band-pass filter may be a Phthalocyanine Blue pigment such as Cyanine Blue #4940N (DAINICHI SEIKA COLOR & CHEMICALS MFG. CO., LTD.), an organic violet pigment such as Hostaperm Violet RLSDICO (Hoechst) or a mixture of the two.
  • the proportion of the pigment in the coating composition is preferably 5 - 40% by weight.
  • the binder resin used in the coating composition includes copolymers of ethylenically unsaturated monomers such as styrene, methyl methacrylate, 2-hydroxyethyl methacrylate and acrylic acid.
  • the coating composition is coated on a resin film such as cellulose triacetate or polyethylene terephthalate or a glass plate in a thickness of several microns.
  • the photodiode includes those sensitive to lights of 250 - 800 nm such as BS-112 manufactured by Sharp Corp. and the like.
  • the means for transferring and digitally indicating electrical signals from the photodiode may be any means which is conventionally used for the same purpose and includes an amplifier and a digital voltage indicator.
  • the high luminance emission intensity means a standard emission intensity of 1,000 mcd or more.
  • the construction of this light quantity adjuster is shown as an electric circuit in Fig. 1. Also, the emission spectrum of the light-emitting diode in Fig. 1 is as shown in Fig. 4.
  • BS-112 manufactured by Sharp Corp. was used as the photodiode in Fig. 1.
  • the amplifier in Fig. 1 was prepared by changing a part of the circuit shown in the "Preparation of Illuminance Meter Using Photodiode" stated in Hisao Nagao, Transistor Technique SPECIAL No. 33, p. 13 (published on May 1, 1992 by CQ Shuppansha).
  • the measurement instrument was prepared by assembling a direct current source, a main switch, a light-emitting diode lighting switch, a switch for changing-over the quantity of light to be emitted and a variable resistor for adjusting the transmittance to 100%.
  • the band-pass filter in Fig. 1 was prepared as follows:
  • a two-liter flask equipped with a thermometer, a dropping funnel, a stirrer and a sample feed opening was charged with 150 parts by weight of toluene and the toluene was warmed to 110°C. Subsequently, a first mixture consisting of 233 parts by weight of styrene, 71 parts by weight of methyl methacrylate, 144 parts by weight of butyl acrylate, 52 parts by weight of 2-hydroxyethyl methacrylate, 2.5 parts by weight of acrylic acid and 5 parts by weight of benzoyl peroxide was dropwise added to the flask over two hours while the mixture was kept at the boiling point.
  • a second mixture consisting of 110 parts by weight of toluene, 75 parts by weight of butyl acetate and 2.5 parts by weight of benzoyl peroxide was dropwise added to the first mixture over two hours after three hours from the start of the dropwise addition of the first mixture, after which the contents of the flask were kept at the boiling point for one hour. Thereafter, 165 parts by weight of xylene was added to dilute the contents, and the contents were cooled. The non-volatile matter thereof was 49.3% (dried at 150°C for three hours) and the viscosity thereof at 25°C was 11 poises.
  • a color chip was prepared in the following manner using the resin thus obtained:
  • the fine powder was dissolved in a solvent mixture of toluene and butyl acetate at a 1/1 volume ratio so that the concentration became 25% by weight, and the solution was then filtered through a 0.5- ⁇ filter and then subjected to centrifugation at 17,000 rpm to remove the undissolved matter, thereby preparing a colored solution.
  • a silane coupling agent (Sila Ace S-330 manufactured by Chisso Corp.) was added at a non-volatile matter ratio of about 5% by weight to the colored solution, and 8% by weight of an isocyanate resin (Takenate D-165N (90PX) manufactured by Takeda Chemical Industries, Ltd.) was added, after which, if necessary, the original resin was added.
  • the resulting composition was coated on a polyester film or a glass plate in a thickness of several microns by means of a bar coater, then dried at 120 - 150°C for 10 - 20 minutes, and thereafter, subjected to measurement of transmittance.
  • the distance between the filter and the end of the light-emitting diode in Fig. 1 was adjusted to 8 mm. Also, the distance between the filter and the light-receiving surface of the photodiode in Fig. 1 was adjusted to 8 mm.
  • a cellulose triacetate film impregnated with Oil Red or PAN (the dye-impregnated film (sample film) to be measured in Fig. 1) was prepared so that the transmittance at about 470 nm became about 1% when measured by a spectrophotometer (U-3400 manufactured by Hitachi, Ltd.), exposed to light outdoors to fade the dye-impregnated film to prepare a sample, and this sample was subjected to measurement of absorption spectrum by U-3400. The same sample was subjected to measurement of transmittance by the measurement instrument of this invention and the transmittance and an absorbance were obtained. (Transmittance (percentage (100 T), ratio (T)) and absorbance (A) are obtained by the following measurement and determination:
  • Fig. 8 shows comparisons between the absorbance measured by an exact spectrophotometer using a light of 440 nm and the absorbance measured under the same conditions by the measurement instrument of this invention, and the measurements were conducted using dye-impregnated films having different degrees of color fading.
  • Fig. 9 is a calibration curve for determining values corresponding to the absorbance values obtained by measurement using lights having wavelengths at the absorption peaks of the respective dyes by an exact spectrophotometer, from the 440 nm absorbance values obtained by subjecting the dye-impregnated films irradiated with a light having a wavelength of 440 nm to measurement by the measurement instrument of this invention.
  • the measurement instrument of this invention which is compact and light in weight can be sufficiently put in practice, and the measurement instrument of this invention can contributes greatly to the grasping of causal relation between environment and growth of organisms, and hence, is very useful.

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  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Molecular Biology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Claims (9)

  1. Appareil simple pour la mesure de la transmission d'un film imprégné d'un colorant pyridylazo-2-napthol ou diméthylphénylazo-2-naphtol ayant un spectre d'absorption continu qui présente plusieurs pics d'absorption dans le domaine de longueurs d'onde allant de 350 à 800 nm, appareil qui comprend :
    une source de lumière comprenant une diode émettant de la lumière avec une intensité d'émission correspondant à une brillance élevée, diode qui émet de la lumière présentant un pic d'intensité d'émission relative situé au voisinage de la longueur d'onde de 450 nm,
    des moyens pour permettre à la diode d'émettre de la lumière,
    un dispositif de réglage de la quantité de lumière,
    un filtre passe-bande qui est constitué essentiellement d'un film de résine ou d'une plaque de verre, revêtue d'une composition de revêtement constituée essentiellement d'au moins un pigment choisi parmi les pigments bleu de phtalocyanine et les pigments violet organiques et finement dispersé dans une résine jouant le rôle de liant, et qui présente un pic de transmission dans le domaine allant de 330 à 480 nm, la transmission au pic étant de 40 % ou plus et la transmission à une longueur d'onde inférieure ou égale à 260 nm et à une longueur d'onde supérieure ou égale à 520 nm étant inférieure ou égale à 1 %, et
    un dispositif récepteur de lumière, comprenant une photodiode sensible à la lumière qui a traversé le filtre passe-bande, et des moyens pour transmettre les signaux électriques provenant de la photodiode et en donner une indication numérique.
  2. Appareil simple selon la revendication 1, dans lequel la diode émettrice de lumière est une diode émettant de la lumière avec une intensité d'émission correspondant à une brillance élevée, qui émet une lumière présentant un pic d'intensité d'émission relative situé au voisinage de la longueur d'onde de 450 nm et une largeur à demi-pic de 70 nm ou moins, à un angle d'émission de 20 ° ou moins.
  3. Appareil simple selon la revendication 1, dans lequel la diode émettrice de lumière est du type fabriqué par la société Nichia Kagaku Kogyo K.K. sous la référence NLPB 500 (longueur d'onde du pic : 450 nm, largeur à demi-pic : 70 nm, caractéristiques d'orientation : 15 °).
  4. Appareil simple selon l'une quelconque des revendications 1 à 3, pour lequel le pigment utilisé dans la composition de revêtement est un pigment bleu de phtalocyanine.
  5. Appareil simple selon l'une quelconque des revendications 1 à 4, pour lequel la résine jouant le rôle de liant, utilisée dans la composition de revêtement, est un copolymère de styrène, de méthacrylate de méthyle, de méthacrylate de 2-hydroxyéthyle et d'acide acrylique.
  6. Appareil simple selon l'une quelconque des revendications précédentes, dans lequel la photodiode est une photodiode sensible à une lumière de longueur d'onde comprise dans l'intervalle allant de 250 nm à 800 nm.
  7. Appareil simple selon l'une quelconque des revendications précédentes, pour lequel le dispositif de réglage de la quantité de lumière comprend une résistance variable et un commutateur de modification de la résistance électrique, capable de régler librement la quantité de lumière d'irradiation émise par la diode émettrice de lumière.
  8. Appareil simple selon l'une quelconque des revendications précédentes, dans lequel les moyens de transmission des signaux et d'indication comprennent un amplificateur et un indicateur de tension numérique.
  9. Appareil simple selon l'une quelconque des revendications précédentes, dans lequel ledit filtre passe-bande est placé dans une position telle que la lumière émise par la diode émettrice de lumière traverse directement le filtre passe-bande, et ladite photodiode est placée de manière à faire face au filtre passe-bande, à une distance permettant d'insérer un échantillon à examiner entre le filtre passe-bande et la photodiode, et de manière à recevoir la lumière qui a traversé le filtre passe-bande et l'échantillon à examiner.
EP95303663A 1995-02-17 1995-05-30 Appareil simple pour la mesure de la transmission Expired - Lifetime EP0727657B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP7029658A JP2740135B2 (ja) 1995-02-17 1995-02-17 簡易吸光度測定器
JP2965895 1995-02-17
JP29658/95 1995-02-17

Publications (2)

Publication Number Publication Date
EP0727657A1 EP0727657A1 (fr) 1996-08-21
EP0727657B1 true EP0727657B1 (fr) 1999-11-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95303663A Expired - Lifetime EP0727657B1 (fr) 1995-02-17 1995-05-30 Appareil simple pour la mesure de la transmission

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US (1) US5568267A (fr)
EP (1) EP0727657B1 (fr)
JP (1) JP2740135B2 (fr)
DE (1) DE69513139T2 (fr)

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US6441903B1 (en) * 1999-04-12 2002-08-27 Sony Corporation Optical sensor for illumination mixtures and method for the design thereof
AU4462500A (en) * 1999-04-12 2000-11-14 Sony Electronics Inc. Optical sensor, method for the design thereof, and camera using the optical sensor
US6252663B1 (en) 1999-04-12 2001-06-26 Sony Corporation Scanning and printing systems with color discrimination
US6215962B1 (en) 1999-04-12 2001-04-10 Sony Corporation Illumination detecting camera
US6819306B1 (en) 1999-04-12 2004-11-16 Sony Corporation Color correcting and ambient light responsive CRT system
GB2352511B (en) * 1999-07-23 2004-05-12 Univ Bath Colourimetry device
US6490037B1 (en) * 2000-11-13 2002-12-03 Test Coach Corporation Method and apparatus for verifying a color of an LED in a printed circuit board
JP3893533B2 (ja) * 2001-02-09 2007-03-14 株式会社日立製作所 液晶表示装置
US7023554B2 (en) * 2003-11-14 2006-04-04 Test Coach Corporation Method and apparatus for determining a color and brightness of an LED in a printed circuit board
US7265822B2 (en) * 2004-10-01 2007-09-04 Test Coach Corporation Method and apparatus for determining presence of a component in a printed circuit board
US20060214089A1 (en) * 2005-03-22 2006-09-28 An Byoung E Method and apparatus for real time output monitoring of light sources and flexible sensitivity adjustment of light sensors
US8107812B2 (en) * 2005-09-23 2012-01-31 Honeywell International Inc. Dynamic range measurement and calculation of optical keyless entry sensor
KR101395766B1 (ko) * 2013-02-04 2014-05-16 동신대학교산학협력단 가시광선 투과율 측정 장치
CN103308459B (zh) * 2013-06-09 2015-05-06 福建农林大学 一种植物特征光谱实验方法
JP6413759B2 (ja) * 2014-12-25 2018-10-31 株式会社島津製作所 光学分析装置
US10302496B2 (en) 2016-02-09 2019-05-28 Nasa Solutions, Llc Method and apparatus for determining presence and operation of a component in a printed circuit board

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JPS57151831A (en) * 1981-03-13 1982-09-20 Japan Organo Co Ltd Photoelectric photometer using light emitting element
DE3405592A1 (de) * 1984-02-16 1985-08-14 Siemens AG, 1000 Berlin und 8000 München Anordnung zur photometrischen konzentrationsbestimmung organischer und anorganischer stoffe
JP2543052B2 (ja) * 1986-11-14 1996-10-16 松下電器産業株式会社 カラ―フィルタ―の製造方法
DK142388A (da) * 1987-03-17 1988-09-18 Diagnostic Systems Inc Fremgangsmaade og apparat til detektering af analyter i fluidumproever, navnlig glucose i legemesvaesker
JPH02232586A (ja) * 1989-03-06 1990-09-14 Toshio Ishikawa 色素計測板を用いた積算全天日射の計測法
JPH04359481A (ja) * 1991-06-05 1992-12-11 Matsushita Electric Ind Co Ltd 半導体発光素子

Also Published As

Publication number Publication date
DE69513139T2 (de) 2000-08-17
US5568267A (en) 1996-10-22
JPH08219875A (ja) 1996-08-30
EP0727657A1 (fr) 1996-08-21
DE69513139D1 (de) 1999-12-09
JP2740135B2 (ja) 1998-04-15

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